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linux-user: Support setgroups syscall with no groups 

Signed-off-by: Dillon Amburgey <dillona@dillona.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Dillon Amburgey 2013-02-02 18:04:48 -05:00 committed by Riku Voipio
parent bfb669f39f
commit f2b79ce9dc
1 changed files with 12 additions and 10 deletions
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8
linux-user/syscall.c
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@ -7680,18 +7680,20 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
{
int gidsetsize = arg1;
target_id *target_grouplist;
gid_t *grouplist;
gid_t *grouplist = NULL;
int i;
if (gidsetsize) {
grouplist = alloca(gidsetsize * sizeof(gid_t));
target_grouplist = lock_user(VERIFY_READ, arg2, gidsetsize * 2, 1);
if (!target_grouplist) {
ret = -TARGET_EFAULT;
goto fail;
}
for(i = 0;i < gidsetsize; i++)
for (i = 0; i < gidsetsize; i++) {
grouplist[i] = low2highgid(tswapid(target_grouplist[i]));
}
unlock_user(target_grouplist, arg2, 0);
}
ret = get_errno(setgroups(gidsetsize, grouplist));
}
break;